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Study of Final-State Radiation in Decays of $Z$ Bosons Produced in $pp$ Collisions at 7 TeV


CMS Collaboration; Khachatryan, V; Sirunyan, A M; Tumasyan, A; Amsler, C; Canelli, F; Chiochia, V; De Cosa, A; Hinzmann, A; Hreus, T; Kilminster, B; Lange, C; Ngadiuba, J; Pinna, D; Robmann, P; Ronga, F J; Taroni, S; Yang, Y; et al (2015). Study of Final-State Radiation in Decays of $Z$ Bosons Produced in $pp$ Collisions at 7 TeV. Physical Review D (Particles, Fields, Gravitation and Cosmology), 91:092012.

Abstract

The differential cross sections for the production of photons in $Z \to \mu + \mu - \upsilon$ decays are presented as a function of the transverse energy of the photon and its separation from the nearest muon. The data for these measurements are collected with the CMS detector and correspond to an integrated luminosity of $4.7  fb^{−1}$ of $pp$ collisions at $\sqrt{s} = 7  TeV$ delivered by the CERN LHC. The cross sections are compared to simulations with $powheg$ and $pythia$, where $pythia$ is used to simulate parton showers and final-state photons. These simulations match the data to better than 5%.

Abstract

The differential cross sections for the production of photons in $Z \to \mu + \mu - \upsilon$ decays are presented as a function of the transverse energy of the photon and its separation from the nearest muon. The data for these measurements are collected with the CMS detector and correspond to an integrated luminosity of $4.7  fb^{−1}$ of $pp$ collisions at $\sqrt{s} = 7  TeV$ delivered by the CERN LHC. The cross sections are compared to simulations with $powheg$ and $pythia$, where $pythia$ is used to simulate parton showers and final-state photons. These simulations match the data to better than 5%.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:27 February 2015
Deposited On:12 Feb 2016 16:22
Last Modified:05 Apr 2016 20:03
Publisher:American Physical Society
ISSN:1550-2368
Publisher DOI:https://doi.org/10.1103/PhysRevD.91.092012
Other Identification Number:arXiv:1502.07940v2

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